今天一台数据库服务器登录不上，报TNS-12541: TNS:no listener
到服务器上看下监听器状态
1. oracle@linux-34:~> lsnrctl status
2.
3. LSNRCTL for Linux: Version 11.1.0.6.0 - Production on 14-OCT-2011 09:12:37
4.
5. Copyright (c) 1991, 2007, Oracle. All rights reserved.
6.
7. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=linux-34.site)(PORT=1521)))
8. TNS-12541: TNS:no listener
9. TNS-12560: TNS:protocol adapter error
10. TNS-00511: No listener
11. Linux Error: 111: Connection refused
12. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
13. TNS-12541: TNS:no listener
14. TNS-12560: TNS:protocol adapter error
15. TNS-00511: No listener
16. Linux Error: 111: Connection refused
启动下试试
1. oracle@linux-34:~> lsnrctl start
2.
3. LSNRCTL for Linux: Version 11.1.0.6.0 - Production on 14-OCT-2011 09:12:45
4.
5. Copyright (c) 1991, 2007, Oracle. All rights reserved.
6.
7. Starting /home/oracle/product/11.1.0/db_1/bin/tnslsnr: please wait...
8.
9. TNSLSNR for Linux: Version 11.1.0.6.0 - Production
10. System parameter file is /home/oracle/product/11.1.0/db_1/network/admin/listener.ora
11. Log messages written to /home/oracle/diag/tnslsnr/linux-34/listener/alert/log.xml
12. Error listening on: (ADDRESS=(PROTOCOL=ipc)(PARTIAL=yes)(QUEUESIZE=1))
13. No longer listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=linux-34.site)(PORT=1521)))
14. TNS-12546: TNS:permission denied
15. TNS-12560: TNS:protocol adapter error
16. TNS-00516: Permission denied
17. Linux Error: 13: Permission denied
18.
19. Listener failed to start. See the error message(s) above...
竟然报TNS-12546: TNS:permission denied
查看下 /var/tmp/.oracle、/tmp/.oracle 这两个目录的权限访问。
1. linux-34:~ # ls -lrtd /tmp/.oracle
2. drwxrwxrwx 2 root root 4096 May 9 16:01 /tmp/.oracle
3.
4. linux-34:~ # ls -lrtd /var/tmp/.oracle
5. drwxr-xr-x 2 root root 4096 Oct 14 09:45 /var/tmp/.oracle
原因应该就在这了，/var/tmp/.oracle是755权限，把它修改为777。
chmod -R 777 /var/tmp/.oracle
然后再启动监听试试。
1. oracle@linux-34:~> lsnrctl start
2.
3. LSNRCTL for Linux: Version 11.1.0.6.0 - Production on 14-OCT-2011 09:45:04
4.
5. Copyright (c) 1991, 2007, Oracle. All rights reserved.
6.
7. Starting /home/oracle/product/11.1.0/db_1/bin/tnslsnr: please wait...
8.
9. TNSLSNR for Linux: Version 11.1.0.6.0 - Production
10. System parameter file is /home/oracle/product/11.1.0/db_1/network/admin/listener.ora
11. Log messages written to /home/oracle/diag/tnslsnr/linux-34/listener/alert/log.xml
12. Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=linux-34.site)(PORT=1521)))
13. Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
14.
15. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=linux-34.site)(PORT=1521)))
16. STATUS of the LISTENER
17. ------------------------
18. Alias LISTENER
19. Version TNSLSNR for Linux: Version 11.1.0.6.0 - Production
20. Start Date 14-OCT-2011 09:45:04
21. Uptime 0 days 0 hr. 0 min. 0 sec
22. Trace Level off
23. Security ON: Local OS A